/* Reset */
html, body, h1, p {
  margin: 0;
  padding: 0;
}

* {
  box-sizing: border-box;
}

html {
  height: 100%;
  font-family: Arial, sans-serif;
  color: #222;
  line-height: 1.5;
}

body {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 10px;
}

a {
  color: #3473ee;
}

.controls {
  display: grid;
  grid-template-areas: ".    up   ."
                       "left down right";
  /* Limit the size of the controls by the viewport size. */
  width: 75vmin;
  height: 50vmin;
  margin: 10px auto;
}

#up { grid-area: up; }
#down { grid-area: down; }
#left { grid-area: left; }
#right { grid-area: right; }

.controls button {
  color: #888;
  font-size: 8vmin;
  background: none;
  border: 2px solid;
  margin: 2px;
  border-radius: 5vmin;
}

.controls button:focus {
  outline: none;
}

@media (min-width: 10cm) and (min-height: 10cm) {
  /* Avoid controls getting too big on larger touch devices. */
  .controls {
    position: absolute;
    width: 7.5cm;
    height: 5cm;
    bottom: 1.5cm;
    right: 1.5cm;
  }
  .controls button {
    font-size: 0.8cm;
    border-radius: 0.5cm;
  }
}

#url,
#max-score-grid {
  background: #8883;
  padding: 2px;
  border-radius: 3px;
}

#share {
  display: inline-block;
}

footer {
  margin-top: auto;
  font-size: 0.9rem;
}

.invisible {
  display: none !important;
}

.hidden {
  visibility: hidden;
}

:root.touch .no-touch-only,
:root:not(.touch) .touch-only {
  display: none;
}

.expandable {
  position: relative;
}

.expand-btn,
.collapse-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-weight: bold;
  cursor: pointer;
  width: 1rem;
}

.expand-btn,
.expandable {
  transition: transform, opacity;
  transition-duration: .4s;
}

.expandable {
  display: inline-block;
  position: relative;
  height: 1.5rem;
  transform: translateX(-100%);
  /* Clear body padding so it doesn't show on the left of the expand-btn */
  padding-right: 10px;
}

.expand-btn {
  position: absolute;
  right: 0;
  top: 0;
  transform: translateX(100%);
  opacity: 1;
}

.help-toggle {
  color: #0bc3ff;;
}

.high-score-toggle {
  color: #ff8c0b;
}

.collapse-btn {
  color: #aaa;
}

.expandable.expanded {
  height: auto;
  transform: none;
}

.expandable.expanded .expand-btn {
  opacity: 0;
}

@media (prefers-color-scheme: dark) {
  html {
    background: #222;
    color: #eee;
  }
}

/* Icon font styles copied from Fontello. */
@font-face {
  font-family: 'icons';
  src: url('icons.woff2?40046441') format('woff2');
  font-weight: normal;
  font-style: normal;
}
[class^="icon-"]:before, [class*=" icon-"]:before {
  font-family: "icons";
  font-style: normal;
  font-weight: normal;
  speak: none;
  display: inline-block;
  text-decoration: inherit;
  width: 1em;
  margin-right: .2em;
  text-align: center;
  /* For safety - reset parent styles, that can break glyph codes*/
  font-variant: normal;
  text-transform: none;
  /* Animation center compensation - margins should be symmetric */
  /* remove if not needed */
  margin-left: .2em;
  /* Font smoothing. That was taken from TWBS */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.icon-share:before { content: '\e811'; }
